Abstract
The objective of this study was to describe the genetic parameters, adaptability, and stability of clones from the Coffea canephora variety ?Vitoria Incaper 8142?, and the genetic divergence between them. Following 12 and 24 months of plant growth, several traits were evaluated, including stem diameter, plant height, canopy diameter, number of plagiotropic branches, and number of nodes per plagiotropic branch. The agronomic performance of four crops was determined using measurements of productivity, yield, percentage of floating grains, and grade of the beans. Variability was observed between the clones for the majority of the traits measured. The clones V7, V10, V12, and V13 were the most stable and displayed the highest degree of adaptation for the studied traits, and thus these clones will be used to establish a base population suited to the growing conditions in Alto Suacui, Minas Gerais, Brazil. Additionally, the genetic dissimilarity identified between clones allowed suitable clone combinations to be proposed for use in future crosses.
Highlights
The territory of Alto Suaçuí Grande in the state of Minas Gerais is included in the territorial model created by the Ministry of Agrarian Development, which aims to combat poverty, reduce social inequalities, promote productive inclusion, and strengthen family farming
The variance components, genetic parameters, and phenotypes estimated for the evaluated traits (Table 1) have averages and variances consistent with other studies analyzing conilon coffee progenies (Ferrão et al 2008, Rodrigues et al 2012)
Considering the evaluated traits, genotypic variance was significant for the traits number of plagiotropic branches (NPB), canopy diameter (CD), % FG, % S10, and % S15-13 between the clones, according to the Likelihood Ratio Tests (LRT) at a 5% significance level (Table 1)
Summary
The territory of Alto Suaçuí Grande in the state of Minas Gerais is included in the territorial model created by the Ministry of Agrarian Development, which aims to combat poverty, reduce social inequalities, promote productive inclusion, and strengthen family farming. Within the guidelines established for the region, the introduction of conilon coffee to the area was identified as an option to promote sustainable development of the territory. The state of Minas Gerais traditionally produces arabica coffee, and little is currently understood concerning the cultivation of conilon coffee in the region (Silva et al 2015). Conilon coffee is an alternative coffee crop in the region because of its rustic qualities, meaning that it is able to adapt to tropical edaphoclimatic conditions of low altitude and high temperatures, and it exhibits enhanced drought tolerance. Olavo Drummond, 05, São Geraldo, 38.180-129, Araxá, MG, Brazil
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